Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/65-15 | 185/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.93 (582.5) | 25.93 (658.5) | 2.99 (76) 13% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 72.05 (1829.98) | 81.45 (2068.74) | 9.4 (238.76) 13% |
| Sidewall Height inches (mm) | 3.97 (100.75) | 5.46 (138.75) | 1.5 (38) 37.7% |
| Revolutions per mile (km) | 879.43 (546.45) | 777.93 (483.39) | -101.5 (-63.07) -11.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.61 mph (36.39 km/h) |
| 25 mph (40.23 km/h) | 28.26 mph (45.48 km/h) |
| 30 mph (48.28 km/h) | 33.91 mph (54.58 km/h) |
| 35 mph (56.33 km/h) | 39.57 mph (63.68 km/h) |
| 40 mph (64.37 km/h) | 45.22 mph (72.77 km/h) |
| 45 mph (72.42 km/h) | 50.87 mph (81.87 km/h) |
| 50 mph (80.47 km/h) | 56.52 mph (90.97 km/h) |
| 55 mph (88.51 km/h) | 62.18 mph (100.06 km/h) |
| 60 mph (96.56 km/h) | 67.83 mph (109.16 km/h) |
| 65 mph (104.61 km/h) | 73.48 mph (118.26 km/h) |
| 70 mph (112.65 km/h) | 79.13 mph (127.35 km/h) |
| 75 mph (120.7 km/h) | 84.79 mph (136.45 km/h) |
| 80 mph (128.75 km/h) | 90.44 mph (145.55 km/h) |
| 85 mph (136.79 km/h) | 96.09 mph (154.64 km/h) |
| 90 mph (144.84 km/h) | 101.74 mph (163.74 km/h) |
| 95 mph (152.89 km/h) | 107.39 mph (172.84 km/h) |
| 100 mph (160.93 km/h) | 113.05 mph (181.93 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 | 2300 | 2477 | 2586 | 2704 | 2788 | 2881 | 2991 | 3142 | 3294 | 3462 | 3597 | 3841 | 4111 | 4322 | 4456 | 4532 | 4810 | 5198 | 6040 |
Better Fuel Economy Factory Ratios Increased Power
